Public bug reported:
Binary package hint: kdm
when a remote xdmcp session is closed by the remote user, the local
display switches to a different virtual console, Ctrl-Alt-F7 has to be
used to get back to the session.
** Affects: kdebase (Ubuntu)
Importance: Undecided
Status: Unconfirmed
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when remote xdmcp session is ended, local session becomes invisible
https://launchpad.net/bugs/96078